在一种化学肥料中,含有两种元素以上的肥料称为复合肥料。一、复合肥料种类(一)按所含元素的有效成分:可分为在含氮、磷、钾中任何两种元素的叫二元复合肥料;同时含氮、磷、钾三种元素的称三元复合肥料;如含三种以上主要营养元素的叫多元复合肥料。在复合肥料中添加硼、 In a chemical fertilizer, containing more than two elements of fertilizer called compound fertilizer. First, the type of compound fertilizer (A) by the active ingredients contained in the elements: can be divided into any two elements containing nitrogen, phosphorus, potassium called binary compound fertilizer; the same time containing nitrogen, phosphorus and potassium three kinds of elements that Ternary compound fertilizer; such as containing more than three kinds of major nutritional elements called multi-compound fertilizer. In the compound fertilizer added boron,